When it comes to the amount of tooth removal required for Veneers there are several things your Cosmetic dentist will be checking for:
- The amount of Colour Correction (Shade Change) you are seeking. Darker teeth will require more tooth removal so a thicker Veneers can block out the dark colour
- position of the teeth in your jaw (Arch Form) Teeth flared towards your lips will often require more tooth removal if you want to align the teeth properly and not have bulky looking teeth. If the teeth are leaning inwards then less tooth material may need to be removed.
- crowding - if teeth are staggered here and there due to crowding (some forward some back) some teeth will require more tooth material removed than others.
- if there are existing fillings on the sides of the teeth (Interproximally) your dentist will probably remove a bit more tooth material so as to not have your Veneer bonded to an old filling.
So, how much depends on your existing condition and what end result you are hoping to achieve. That being said, in most cases you are looking at about 1mm on average (again this varies individual to individual)
Hope that helps